Negative Feedback Loop

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🧭 Negative Feedback Loop

Painted circular flow diagram of negative feedback. 5 steps in a clockwise loop: (1) set point (e.g. body temp 37°C with thermometer icon), (2) change detected (rise or fall with up/down arrows), (3) receptors (eye icon for skin/brain hypothalamus), (4) coordinator (brain icon for nervous/hormonal signal), (5) effectors (muscle icon for muscles/glands acting). Central scale balance icon shows equilibrium maintained. Parchment scroll: "negative feedback OPPOSES the change — if temperature rises, response cools you down; if it falls, response warms you up. Always returns to set point." Examples on side: thermostat and human body silhouette.

Figure 1: The negative feedback loop — any deviation from normal triggers a corrective response in the opposite direction.

Note the key feature: the arrows always point back toward the centre (the normal level). The response is always in the opposite direction to the deviation. This is what makes it negative feedback.

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